You did not ask me ...... But I will give my point.
To me choking is when you play different than you normally do when you are in a high pressure game.
In both playoff San Fran games Dak did not look like he normally looks in the regular season ..... he looked uncomfortable and his passes were going all over the place ....... he was thinking about it to much.
In the regular season San Fran game Dak froze up ....... he had the "deer in the headlights" look and could not complete a simple pass ....... then the entire team gave up.
In the dreaded playoff Green Bay game Dak looked the same as the 49'r game ....... "deer in the headlights" could not complete a pass ........ his teammates finally went at him about it during the game (did not help matters) ....... and the rest of the team gave up.
After the game got out of reach, and the pressure was gone, he suddenly was the normal Dak again and tried to make a come back that fell way short.